Thomas a



(No Model.)

T. A. EDISON.

REGULATOR FOR DYNAMO ELECTRIC MACHINES.

No. 264,664. Patented Sept. 19, 1882.

WITNESSES INvEN TOR ls. may cb vam 8W 6.0M- /m ww v ATTORNEY UNITED STATES PATENT GEE-ice,

-THOMAS A. EDISON, OF MENLO PARK, NEXV JERSEY.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 264,664, dated September 19, 1882.

Application filed August 7, 1882. (No model.)

To all whom it may concern:

Be it known that .i, THOMAS A. EDISON, of Menlo Park, in the county of Middlesex and State of New Jersey, have invented a new and useful Improvement in Regulating the Generative Capacity of Dynamo or Magneto Electric Machines, (Case No. 393;) and I do hereby declare that the following is afull and exact description of the same, reference being bad to the accompanying drawing, and to the letters of reference marked thereon.

The object I have in view is to produce simple and efficient means for regulating the generative capacity of a dynamo or magneto electric machine, which will be wholly dependent upon and controlled by the throwing in and out of the translating devices, arranged in multiple-arc or derived circuits, without the use of actuating mechanism other than the usual circuit-controllers at the individual translating devices.

This invention is an improvement upon that described in my Patent No. 248,422, in which only part of the current furnished the lamps passes through the. circuit of the field-magnet, and circuit-controllers, in addition to the usual ones at the iii'dividual translating devices, are employed to make and break separate field-circuits.

In carrying out the present invention one of the main conductors is divided into a number of parts, each of which partsis connected with bobbins on the limbs of the field-magnet between the commutator-brush and the lampcircuits. Between each part of the divided conductor and the undivided main conductor is located one set of conductors in multiplerc or derived circuits, from which last conductors the lamps or other translating devices are arranged; but a number of such sets of conductors may be connected with each part of the divided main conductor; or the separate lamp-circuits may be connected directly with each part of such divided main conductor. In addition to the bobbins spoken of, a portion of the field-magnet is wound with wire, which forms part of a field-circuit, which has such re sistance produced by the Winding itself or by extra resistance as to supply only a small amount of currentienough to primarily energize the magnets. This circuitis preferably a derived or multiple-arc circuit from the main I conductors; but it may be one supplied from a battery, a dynamo or magneto electric ma chine, or other external source. When the multiple-arc circuits of part or all of the translating devices connected with any division of the main conductor are closed by the usual circuit-controllers the current flowingthrough them will also flow through the bobbins of the field-magnet connected with the particular division of the main conductor, and the energy of the fieldmagnet will be increased in direct proportion to the number of translating devices in circuit, and as the other divisions are closed by the addition of otherlauipsorgroups of lamps the field-magnet becomes more and more energized, increasing to the desired tent the electro-motive force of the machine. This may be better understood by reference to the drawing, which is a diagrammatic view of a dynamo-electric machine with its circuits.

A is the field-magnet of the machine, and l 2 are the main conductors leading therefrom. 3 at is the field-circuit of constant resistance. At the point a the main conductor2 isdivided into a number of conductors, 5 5, each of which includes a portion of the coilsof the field-mag net A. From each of the circuitsl 5 acircuit, 6 7, is derived, on which translating devices 0 I), having the usual circuit-control]ers, c, are placed in multiple are.

It is evident that as fast as more translatcuit the current will pass through a greater portion of the coils of the field-magnet, and the latter will therefore be more and more energized.

I do not claim broadly the combination,

with a multiple-arc system of electric lighting, of a portion of the coils of the field-magnet formed by one of the main conductors, as this forms the subject-matter of a claim in application No. 68,621 of even date herewith.

What I claim is- 1. The combinatioinwith a dynamo or magneto electric machine, of a divided main conductor therefrom, each division of which includes a portion of the coils of the field-magnet of the machine, and forms, with the other main conductor, a circuit on which translating devices are placed in multiple arc, substantially as set forth.

2. The combination, with a multiple-arc ciring devices or groups thereof are placed in circuitot' constant resistance from the main conl groups of translating devices, (all such mulductors of a dynamo or magneto electric matiple-arc circuits being derived from the same chine forprimarily energizing the field-magnet main conductors,) and a portion of the coils I of such machine, of the divisions of one of such of the field-magnet formed by'divisions of one main conductors, each including a portion of of such main conductors, substantially as set the coils of said field-magnet for increasing the forth. strength of the same, substantially as setforth. This specification signed and witnessed this 3. The combination of a multiple-arc circuit 10th day of February, 1882. containing a portion of the coils of the field- THOMAS A. EDISON. magnet of a dynamo-electric machine, a multiple-arc circuit containing the armature of said machine, multiple-arc circuits containing Witnesses:

H. W, SEELY, WM. H. MEADOWOROFT. 

